There must be three or more members of the Hearing Board present to make a decision. The decision shall be in
writing, served and filed within fifteen (15) days after submission of the cause by the parties thereto, and shall
contain a brief statement of facts found to be true, the determination of the issues presented and the order of
the Hearing Board. A copy shall be mailed or delivered to the Air Pollution Control Officer, the petitioner and
to every person who has filed an answer or who has appeared as a party in person or by counsel at the hearing.